One of my most memorable childhood trips was to the Soudan mine in Minnesota. It was only 2350 feet deep, but we got to ride down in a similar elevator and my e

One of my most memorable childhood trips was to the Soudan mine in Minnesota. It was only 2350 feet deep, but we got to ride down in a similar elevator and my ears popped. I'd never flown before, so it was a very foreign sensation. The mine itself was something both alien (complete darkness, solid rock) and cartoonish (cart on tracks). http://en.wikipedia.org/wiki/Soudan_Underground_Mine_State_Park http://en.wikipedia.org/wiki/Soudan_Underground_Mine_State_P...